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USB2504A датащи(PDF) 45 Page - SMSC Corporation |
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USB2504A датащи(HTML) 45 Page - SMSC Corporation |
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45 / 46 page ![]() Integrated USB 2.0 Compatible 4-Port Hub Datasheet SMSC USB2504/USB2504A 45 Revision 2.1 (12-06-06) DATASHEET Chapter 9 AC Specifications 9.1 Oscillator/Clock Crystal: Parallel Resonant, Fundamental Mode, 24 MHz ±100ppm. External Clock: 50% Duty cycle ± 10%, 24 MHz ± 100ppm, Jitter < 100ps rms. 9.1.1 SMBus Interface: The SMSC Hub conforms to all voltage, power, and timing characteristics and specifications as set forth in the SMBus 1.0 Specification for Slave-Only devices (except as noted in Section 5.3). 9.1.2 I2C EEPROM: Frequency is fixed at 59KHz ± 20%. 9.1.3 USB 2.0 The Hub conforms to all voltage, power, and timing characteristics and specifications as set forth in the USB 2.0 Specification. Please refer to the USB Specification for more information. |
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